POINT PLEASANT BEACH, N.J. — A week after Superstorm Sandy pummeled the East Coast, wiping out entire communities, residents were bracing for yet another potentially damaging storm. A nor’easter taking shape today in the Gulf of Mexico was expected to begin its march up the coast, eventually passing within 50 to 100 miles of the wounded New Jersey coastline on Wednesday. The storm was expected to bring winds of up to 55 mph, coastal flooding, up to 2 inches of rain along the shore, and several inches of snow to Pennsylvania and New York. One of the biggest fears was that the storm could bring renewed flooding to parts of the shore where Sandy wiped out natural beach defenses and protective dunes. “It’s going to impact areas many areas that were devastated by Sandy. It will not be good,” said Bruce Terry, the lead forecaster for the National Weather Service. Some communities were considering again evacuating neighborhoods that were hard hit by Sandy and where residents had only recently been allowed to return. No town had made a final decision to do so as of mid-afternoon today.